• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文学位 >Reversability of arctic sea ice retreat - A conceptual multi-scale modeling approach.
【24h】

Reversability of arctic sea ice retreat - A conceptual multi-scale modeling approach.

机译：北极海冰撤退的可逆性-一种概念化的多尺度建模方法。

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The ice-albedo feedback has been identified as an important factor in the decay of the Arctic sea ice cover in a warming climate. Mechanisms of transition from perennial ice cover to seasonal ice cover are discussed in the literature; the existence of a tipping point is disputed. A newly developed regular network model for energy exchange and phase transition of an ice covered ocean mixed layer is introduced. The existence of bistability, a key ingredient for irreversibility, on local and regional scales is explored. It is shown in a spatially confined model that the asymptotic behavior and the existence of a parameter region of bistability strongly depend on the albedo parametrization. The spatial dynamics of sea ice retreat are studied for a high resolution latitudinal model of the ocean mixed layer. This regional model suggests that sea ice retreat is reversible. It is shown that laterally driven melt of thick multi-year sea ice, and thus, ice-albedo feedback, is an important mechanism in the transition from perennial to seasonal ice cover at the pole. Results are used to interpret observed changes in the recent ice extent and ice volume record. It is shown that the effectiveness of ice-albedo feedback strongly depends on the existence of lateral heat transfer mechanisms in the ocean.
机译：冰-反照率的反馈已被认为是在气候变暖时北极海冰覆盖衰减的重要因素。文献讨论了从多年生冰盖过渡到季节性冰盖的机制。临界点的存在是有争议的。介绍了一种新开发的规则网络模型，用于冰覆盖的海洋混合层的能量交换和相变。在本地和区域范围内探讨了双稳态的存在，双稳态是不可逆的关键因素。在空间受限的模型中表明，渐近行为和双稳性参数区域的存在很大程度上取决于反照率参数化。针对海洋混合层的高分辨率纬度模型，研究了海冰撤退的空间动力学。该区域模型表明海冰撤退是可逆的。结果表明，横向驱动的多年厚海冰融化，以及由此产生的冰-反照率反馈，是极地从多年生冰盖过渡到季节性冰盖的重要机制。结果用于解释近期冰范围和冰量记录中观察到的变化。结果表明，冰-反照率反馈的有效性在很大程度上取决于海洋中横向传热机制的存在。

著录项

  • 作者

    Mueller-Stoffels, Marc.;

  • 作者单位

    University of Alaska Fairbanks.;

  • 授予单位 University of Alaska Fairbanks.;
  • 学科 Geophysics.;Physics General.;Climate Change.
  • 学位 Ph.D.
  • 年度 2012
  • 页码 117 p.
  • 总页数 117
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号